Window lock



May 17, 1938. J. s. GULLBORG WINDOW LOCK Filed June 1, 193'? ill Patented May 17, 1938 UNITED STATES PATENT OFFICE 1 Claim.

The present invention relates to a window lock and more particularly to means for relatively adjusting the two sashes of a window, which, when so adjusted, cannot be otherwise adjusted except by an authorized person.

An object of the present invention is to provide novel means for relatively adjusting the two sashes of a window.

Another object of the present invention is to provide means for adjusting window sashes which at the same time constitutes locking means for the sashes.

Another object of the present invention is to provide a novel screw and nut arrangement for relative adjustment of the sashes of a window.

A still further object of the present invention is to provide a novel screw and nut arrangement for the relative adjustment of the sashes of windows wherein a removable handle is utilized for actuating the nut, whereby when the handle is removed manipulation of the nut is prevented, thereby locking the sashes in adjusted position.

Another and still further object of the present invention is to provide a novel window sash adjusting means and lock.

The above, other, and further objects of the present invention will be apparent from the following description and accompanying drawing.

The accompanying drawing illustrates an embodiment of the present invention, and the-views thereof are as follows:

Figure 1 is an elevational View of a fragmental portion of a window frame showing the upper sash in closed position and a fragmental portion of the lower sash, also in closed position, with the novel lock of the present invention applied to the sashes.

Figure 2 is an enlarged vertical sectional view taken substantially in the plane indicated by ine II-II of Figure l, with the window frame eliminated, and showing the relative position of the sashes when both are closed.

Figure 3 is an enlarged fragmental horizontal sectional view taken substantially in the plane indicated by line"III-III of Figure 2.

Figure 4 is a fragmental elevational view showing the cooperating miter gears of the present invention, and looking from the right towards the left at the lower portion of the arrangement of Figure 2.

The drawing will now be explained.

A window frame of conventional construction is indicated at A.

Slidably arranged within the frame A is an upper sash B and a lower sash C, of conventional construction.

Attached to the top rail 1 of the upper sash B is a bearing member D, while attached to the bottom rail 2 of the upper sash B is another bearing member E.

The bearing member D is formed from tubular stock, with a portion thereof flattened, as at 3, to provide an attached portion for the bearing member. The flattened portion 3 of the bearing member D is shown as secured to the top rail 2 of the upper sash by means of screws 4. The bearing member as illustrated comprises a tubular recess, vertically arranged, and with its lower end opened.

The bearing member E is illustrated as comprising a plate 5 which is adapted to be fastened. to the bottom rail 2 of the upper sash B by means of screws 6, or other suitable fastening means. Constituting an integral part of the bearing member E is an upstanding cylindrical collar 1, open through its bottom and top.

The bearing members D and E are arranged on the top and bottom rails of the upper sash B, so that the cylindrical collar or portions thereof will be in vertical alignment.

A screw F is supported by the bearing members D and E, in vertical posititon. The upper end of the screw is entered in the bearing member D, while the lower end of the screw is entered in the collar 1 of the lower bearing member E. To prevent rotative movement of the screw, in

service, a pin 8 passes through registering open ings in the collar 1 and the lower end of the screw F, as illustrated in Figure 2, thereby preventing rotative movement of the screw with respect to its bearing members, and also retaining the screw and bearing member E in connected relationship for assembly purposes.

A bracket, designated generally at G, is attached to the top rail 8a of the lower sash C.

The bracket G is illustrated as having a base 9 which is fastened to the rail 8a of the lower sash by means of screws ill or other suitable fastening means. Rising from the base 9 is a wall I l formed with an outstandingboss which is hollow, with a cylindrical interior, and of appreciable length. Integral with the wall II and disposed at substantially 90 thereto is a part l3 which carries an integral collar M, with its axis vertical, with respect to the base 9 of the bracket.

Miter gears H and K are supported by the boss l2 and the collar [4 respectively.

The miter gear H has an elongated hub l5 which is entered in the interior of the boss I2 and has bearing in the boss. The hub I5 is hollow and the gear has a hollow interior l6 of polygonal formation in section, to serve as a socket for receiving the polygonal end ll of an actuating member, such as a crank I8. The

crank is removably arranged within the hub l5 of the gear. A handle I9 is supported on the extremity of the crank, in a loose manner, for a purpose well understood, so that the crank may be rotated to rotate the miter gear H.

The miter gear K has a hollow interior which (iii is threaded for threaded engagement with the screw F, and is provided with a hub 20 which extends upwardly through the collar M of the bracket, for the purpose of affording suflicient bearing between the miter gear and the collar l4, as well as providing extended threaded engagement with the screw F.

At the time the gears H and K are assembled in the bracket G, the gear H is first assembled by passing its hub l5 into the interior of the boss l2, whereupon the miter gear K is applied upwardly through the collar M of the bracket. The hub portion of the gear K is longer than the axial length of the collar I4. After the miter gear K has been inserted in the collar M, a ring 2| is applied about the extremity of the hub and against the upper margin of the collar 14, whereupon the upper end of the hub 20 is spun or peened to overlie the ring 2| and thus retain the miter gear K in assembled relationship in the bracket G.

The gears H and K are meshed after assembly.

The adjusting device of the present invention is applied to the sashes of a window in the following manner:

The screw F is threaded into the miter gear or nut K and its lower end then attached to the plate or bearing member E. The bearing member E and the bracket G are then placed on the lower rail of the upper sash and the upper rail of the lower sash, in desired position, in such manner as to allow relative movement of the sashes, whereupon the bearing member E and the bracket G are fastened to their respective rails. The upper bearing member D is then applied over the upper end of the screw F and lowered a sufficient amount to afiord proper bearing engagement, whereupon the screws 4 are applied to the fiattened portion of the bearing member D, thus connecting the various parts of the device in operative position.

If it is desired to relatively adjust the sashes from closed position, the crank 18 is inserted with its polygonal end I! entering the hub l5 of the miter gear H until the polygonal portions of the crank and gear are engaged, whereupon rotation of the crank will rotate the miter gear or nut K and cause it to travel along the screw F.

The screw F is illustrated as a right hand screw.

As the crank is rotated in clockwise direction, as viewed in Figure 1, the nut K will be caused to travel up the screw F. Such travel will move the sashes B and C relatively to each other. If the operator holds down the lower sash C, and works the crank I8, then the upper sash B will be lowered. If it is desired to have the upper sash closed and the lower sash raised, then after the two sashes have been relatively adjusted to the proper amount of opening, the operator may then manually push the connected sashes up or down as he desires.

The moment rotation of the crank l8 ceases, the adjusted position of the sashes will be fixed until further rotation of the nut or gear K by the crank I8.

The pitch of the threads of the screw F, and the corresponding threads in the nut K, is such that relative movement between the screw and the nut cannot occur unless the nut is rotated, the construction thereby constituting a lock for securing the sashes together in adjusted position.

As long as the crank I8 is removed from the bracket, rotation of the nut or gear K cannot be effected, as the polygonal portion of the miter gear H is spaced from the outer end of the hub [5. Of course, a suitable tool might possibly be inserted for rotating the nut K.

However, the construction is such that, where the two sashes are adjusted to afiord an opening at either the upper or lower portion of the frame, if an intruder attempted to manipulate the nut K from outside of the building, it would be impossible for him, working through the small opening afiorded by the adjusted position of the sashes, to insert a suitable tool in the hub l5 of the gear H and rotate it sufficiently to increase the window opening.

The construction of the parts is such that ordinary window sashes may be readily adjusted, when equipped with the device of the present invention, without undue strain and wear on the various instrumentalities entering into the construction of the present invention.

It will be observed that the device of the present invention is one which may be economically manufactured to sell at an attractive price and is one which may be readily installed and which is adapted for easy manipulation and operation.

As may be readily observed, manipulation oi the crank, to open the window, causes relative movement of the sashes B and C. It makes no difference which sash is moved, as after the sashes have been relatively adjusted to afford the desired window opening then the sashes together, as locked by the adjusting device of the present invention, may be raised or lowered to bring the opening at the bottom or at the top of the window, regardless of which sash is moved when the adjusting device is manipulated.

The invention has been described herein more or less precisely as to details, yet it is to be understood that the invention is not to be limited thereby, as changes may be made in the arrangement and proportion of parts, and equivalents may be substituted without departing from the spirit and scope of the invention.

The invention is claimed as follows:

In combination with a window frame and two vertically slidable sashes of means for locking the two sashes together in relatively adjacent position, said means including a bracket having an upstanding collar secured to the lower rail of the upper sash, a threaded rod vertically disposed with its lower end in said collar and thereto pinned in non-rotative relation, a stamped upper bracket having a flat part for attachment to the upper rail of the upper sash and having a socket part receiving the upper end of said rod, a bracket secured to the upper rail of the lower sash and supporting a nut surrounding and in threaded engagement with said rod, a bevel gear integral with said nut, said last mentioned bracket supporting a second bevel gear in mesh with said first bevel gear, said second bevel gear having an elongated horizontally disposed hollow hub with the inner portion of the hub adjacent the gear of polygonal cross-section and with the balance of the interior of the hub cylindrical, a removable crank having an end of polygonal formation shaped to fit with the polygonal section of said hub in driving relation, the construction being such that when the crank is removed the polygonal section of the hub is so remote from the crank entrance end of the hub that an unauthorized tool such as a screwdriver cannot readily be inserted in the hub by a person on the outside of the window to open the window.

JOHN S. GULLBORG. 

